EP 2000452 A1 20081210 - Polymerization inhibitor for tetrafluoroethylene
Title (en)
Polymerization inhibitor for tetrafluoroethylene
Title (de)
Polymerisierungshemmer für Tetrafluorethylen
Title (fr)
Inhibiteur de polymérisation pour tétrafluoroéthylène
Publication
Application
Priority
- JP 2007129135 A 20070515
- JP 2007301870 A 20071121
Abstract (en)
The present invention provides a polymerization inhibitor preventing the self-polymerization of TFE and the generation of a modified polymer of a polymerization inhibitor in a distillation step, particularly in a rectification step, of TFE. The present invention provides a method of distilling tetrafluoroethylene in the presence of a polymerization inhibitor comprising a cyclohexadiene compound of the formula: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R 1 -A-R 2 wherein R 1 is a hydrocarbon group having 1 to 5 carbon atoms, R 2 is a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and A is a cyclohexadiene ring. The cyclohexadiene compound is preferably ±-terpinene or ³-terpinene.
IPC 8 full level
C07C 17/42 (2006.01); C07C 17/386 (2006.01)
CPC (source: EP US)
C07C 17/386 (2013.01 - EP US); C07C 17/42 (2013.01 - EP US)
Citation (applicant)
- US 2737533 A 19560306 - MITCHEL MARKS BARNARD, et al
- US 3834996 A 19740910 - AISO H, et al
Citation (search report)
- [DX] GB 1317517 A 19730523 - DAIKIN IND LTD
- [A] EP 0724148 A1 19960731 - DAIKIN IND LTD [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2000452 A1 20081210; EP 2000452 B1 20140507; US 2008287715 A1 20081120; US 7807859 B2 20101005
DOCDB simple family (application)
EP 08008939 A 20080514; US 12079608 A 20080515